Sound-deadening device.



E. M. HACKETT.

SOUND DEADENING DEVICE.

APPLICATION FILED JUNE ll. I915- qu Patented 001. 31,1916.

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WM ii EDWARD IVL HACKETT, OF NEW YORK, N. Y.

SOUND-DEADENING DEVICE.

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Specification of Letters Patent.

Patented Got. 31, 1916.

Application filed June 11, 1915. Serial No. 33,629.

To all whom it may concern.

Be it known that I, EDWARD M. HAOKETT, a citizen of the United States, residing at 237 East Thirtythird street, in the city, county, and State of New York, have invented new and useful Improvements in Sound-Deadening Devices, the objects of which are, first, to avoid the noise and the wear and tear of trains and structures caused by the wheels of said trains rolling across the square joints which divide the sections of railroad-rails; second, for the restraining of the resonant noise caused by the wheels of trains rolling on railroad-rails.

Having thus stated the objects of my invention, I declare the following to be a clear description of the devices whereby said objects are attained.

Reference being had to the drawings hereto annexed and forming part of this specification wherein similar letters indicate similar parts,

Figure 1 indicates top view of four sections of a railroad rail and railroad w.heel containing my improvements. Fig. 2 indicates an end view of the rail and improvements shown on Fig. 1. Fig. 3 indicates a section of the rail shown on Fig. 1. Fig. 4 indicates a view of the top and of both sides of the rail shown in Fig. 5. Fig. 5 indi cates an end view of the rail and improvements shown on Fig. &; on Fig. 5 is also shown a railroad wheel perpendicularly placed on the rail thereby showing a face view of the flange F and of the gear G of the wheel W. Figs. 6, 7 and 8 show the wheel, the rail, the section of the rail, the joint and fishplates now in general use. These are placed here in contrast with Figs. 1, 2 and 3 to which my devices are applied in which comparison Fig. 8 indicates one of those square ended sections which are firmly joined together in straight rails by fishplates and correspondingly so in circular rails as shown in Fig. 6 so the joining line of the sections comes parallel with the face line of the gear G of the wheel in rolling from section to section so that each wheel invariably strikes the end of the section ahead whether rolling on straight or circular rails as shown in Fig. 6 and thereby causes a jolting noise and wear and tear of trains and structures. In order to avoid said noise and said wear and tear, I have devised the construction of railroad rails of beveled ended sections as indicated separately by Fig. 3 and collec- 'tively by Fig. l but as the sections are joined on the bevel, the top bars of the sections would be spread apart by the rapidly rotating wheels of weighty trains. In order to prevent said spreading and to firmly secure the beveled joining of the section and thereby avoid the jolting noise and wear and tear of trains and structures, I have devised an improvement in fishplates as indicated by the letter F P which consists in vertically extending their top edges so as to apply to the top bar of the rail much the same as the fish plate applies to the web of the rail. The top edge of the fish plate on the right side of the rail is made to extend up as far as the flange'F of the wheel will allow and the top edge of the fishplate on the left side of the rail is made to extend up as far as the gear G of the wheel will allow without contact.

On Fig. 5 is shown a railroad wheel perpendicularly placed as if rolling on the rail, thereby showing the manner of adjusting said improved fishplates so as to squeeze like the jaws of a vise the top bar of the rail, but more especially so as to squeeze the bevel joining of the top bars of the sections of the rail as shown on Figs. 4 and 5, but as there may be some rails, some bends, rounds and shallow top bars to which both improved fishplates could not be usefully applied the plate on the left may be applied as shown on Figs. 1 and 5. But to overcome such difiiculties, I provide the joint plate J. P. as a substitute for the extended fishplate as shown disposed on the left side of Figs. 1 and 2, a side view of which plate is shown lying flat and an edge view is shown applied in Fig. 1 indicating the manner and purpose of its application to the bevel joining of the top bars. v

The second object of my invention is the restraining of resonant noise caused by wheels of trains rolling on railroad rails. In order to accomplish said object, I use bolts and nuts provided with screws. I insert the bolts in holes provided for them in the top bars of rails and correspondingly so in the extended plate on the left side of the rail as shown on Figs. 4c and 5 and in a like manner in the adjoined rails as shown on Figs. 1 and 2. The heads being placed on the right side and countersunk in the top bars so as to avoid contact with the flange of the wheel and the nuts applied to the ends of the bolts on the left side of the rail thereby placing said plates andsaid top bars directly between the heads and nut of said bolts as shown on Figs. 1, 2, 4 and 5 so that by screwing on the nuts said bars and said plates are firmly squeezed between the heads and nuts of said bolts and thus is the noise restrained in the bars and the bevel joinings strengthened so as to constitute them bridges in the rail on which bridges the wheels of trains roll from section to section as if all sections Were one continuous rail thus not only avoiding the noise and wear and tear but efiectually abolishing the cause thereof. Thus are both objects of my invention attained; but this device for restraining noises is not confined to the top bars of railroad rails. It may be applied to any structure or part thereof for the. purpose herein described.

EDWARD M. HACKETT.

Witnesses:

FRED P. BEAUDRY, L. F. LOGKRIDGE.

Copies of this 'patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

